为揭示海南尖峰岭地区闽粤苏铁（Cycas taiwaniana Carruth.）群落结构特征与演替阶段，明确该种的生存状态，以山荣、娜姆河和国界的闽粤苏铁群落为研究对象，对群落的物种组成、重要值、垂直结构及径级结构进行分析，并对闽粤苏铁种群的径级结构和动态指数进行分析。结果表明：该群落木本植物有48科104属147种（含亚种和变种，下同），其中，含1种的科占比41.7%，含2～5种的科占比45.8%。种-多度分布曲线及频度分析结果均表明该群落的物种多度和频度分布不均衡。闽粤苏铁的重要值高达44.0%，其余乔木和灌木种类的重要值普遍较低。该群落乔木层的垂直结构呈金字塔形，其中，60.1%的个体集中在乔木层的下层（高度3.0～6.0 m）。整个群落的径级结构呈“倒J”型，其中，小径级（乔木胸径或灌木基径在6 cm以内）个体占比高达73.6%，大径级（乔木胸径或灌木基径在16 cm及以上）个体占比仅2.5%。国界种群个体较多（275株），径级结构完整，更新能力强；而山荣和娜姆河种群个体较少（分别为8和9株），存在径级缺失情况，更新能力较弱。从种群动态指数看，3个区域的闽粤苏铁种群均呈现增长趋势，且国界种群对完全随机干扰所承担的最大风险概率明显低于山荣和娜姆河种群，对外部环境干扰的敏感性更强。综上，海南尖峰岭地区闽粤苏铁群落呈现典型的次生群落特征，并处于早期演替阶段；虽然闽粤苏铁在灌木层中占据主导地位，但其种群在未来更新中可能受限。建议在海南尖峰岭地区实施兼顾生态监测、生境优化与社区共管的综合保护策略，以达到增强群落稳定性、实现闽粤苏铁种群可持续发展及生态保护与地方经济协同发展的目标。

 To reveal the community structure characteristics and succession stage of Cycas taiwaniana Carruth. in Jianfengling area of Hainan Province, and clarify the survival status of this species, the C. taiwaniana communities in Shanrong, Namu River, and Guojie were taken as research objects, the species composition, importance value, vertical structure, and diameter class structure of the communities were analyzed, and the diameter class structure and dynamic indexes of the C. taiwaniana population were analyzed. The results show that there are 147 species (containing subspecies and varieties, the same below) of woody plants belonging to 104 genera of 48 families in this community, in which, the families containing one species account for 41.7%, and the families containing 2-5 species account for 45.8%. The species-abundance distribution curve and frequency analysis results both indicate an uneven distribution of species abundance and frequency in the community. The importance value of C. taiwaniana is as high as 44.0%, while the importance values of the other arbor and shrub species are generally low. The vertical structure of the arbor layer in the community is pyramidal, in which, 60.1% of individuals concentrate in the lower layer (3.0-6.0 m of height) of the arbor layer. The diameter class structure of the entire community exhibits an “inverted J”-shape, in which, the small-diameter (diameter at breast height of arbors or basal diameter of shrubs less than 6 cm) individuals account for as high as 73.6%, while the large-diameter (diameter at breast height of arbors or basal diameter of shrubs 16 cm and greater) individuals account for only 2.5%. The Guojie population has many individuals (275 individuals), exhibits a complete diameter class structure, and has a strong regeneration capacity; while the Shanrong and Namu River populations have few individuals (which are 8 and 9 individuals, respectively), exhibits gaps in diameter classes, and have a weak regeneration capacity. Based on the population dynamic indexes, the populations of C. taiwaniana in all three regions show a growth tendency. Moreover, the maximum risk probability  of Guojie population to completely random disturbance is obviously lower than those of Shanrong and Namu River populations, and has a higher sensitivity to external environmental disturbance. In conclusion, the C. taiwaniana community in Jianfengling area of Hainan Province shows typical secondary community characteristics and is in an early successional stage; although C. taiwaniana dominates in shrub layer, its population may face limitations in future regeneration. It is recommended to implement comprehensive conservation strategies in Jianfengling area of Hainan Province viz. integrate ecological monitoring, habitat optimization, and community co-management to enhance community stability, achieve sustainable development of the C. taiwaniana population, and promote synergistic development of ecological conservation and local economy.